Answer :
Answer:
Surface area of the cone =352 feet²
Step-by-step explanation:
To calculate the surface area of a cone, we will use the formula;
Surface area of a cone = πr² +πrl
where r denotes the radius of the cone and l denotes the slant height of the cone.
From the question given
radius r =7 slant height l=9 and π =22/7
we can now proceed to insert the variables into the formula and then solve
Surface area of a cone = πr² +πrl
=22/7 × 7² + 22/7 × 7×9
= 22/7 × 49 + 22/7 × 63
=154 + 198
=352 feet²
Surface area of the cone =352 feet²